中国物理B ›› 2004, Vol. 13 ›› Issue (4): 542-545.doi: 10.1088/1009-1963/13/4/023

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Giant magnetoresistance in Y0.9La0.1Mn6Sn6 compound

汪汝武1, 张立刚1, 姚金雷2, 杨德仁2, 严密2   

  1. (1)Department of Applied Physics, University of Science and Technology of Wuhan, Wuhan 430081, China; (2)State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China
  • 收稿日期:2003-10-16 修回日期:2003-10-24 出版日期:2004-04-22 发布日期:2004-04-20
  • 基金资助:
    Project supported by the State Key Programme of Basic Research of China, and the National Natural Science Foundation of China (Grant No 50171079).

Giant magnetoresistance in Y0.9La0.1Mn6Sn6 compound

Yao Jin-Lei (姚金雷)a, Wang Ru-Wu (汪汝武)b, Yang De-Ren (杨德仁)a, Yan Mi (严密)a, Zhang Li-Gang (张立刚)b   

  1. a State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China; b Department of Applied Physics, University of Science and Technology of Wuhan, Wuhan 430081, China
  • Received:2003-10-16 Revised:2003-10-24 Online:2004-04-22 Published:2004-04-20
  • Supported by:
    Project supported by the State Key Programme of Basic Research of China, and the National Natural Science Foundation of China (Grant No 50171079).

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摘要： Magnetic transitions and magnetoresistance effect of the HfFe_6Ge_6-type Y_{0.9}La_{0.1}Mn_6Sn_6 compound have been investigated in the temperature range of 5－380K. The sample displays antiferromagnetic behaviour in the whole temperature range below Néel temperature T_N=309K. The metamagnetic transition from antiferromagnetism to ferromagnetism can be induced by an applied field. The metamagnetic transition field decreases monotonically from 2T at 5K to 0.4T at 300K. The giant magnetoresistance effect is observed with the metamagnetic behaviour, such as -10.4% at 245K under a field of 5T.

关键词: rare-earth manganese compounds, giant magnetoresistance, metamagnetic transition

Abstract: Magnetic transitions and magnetoresistance effect of the HfFe$_6$Ge$_6$-type Y$_{0.9}$La$_{0.1}$Mn$_6$Sn$_6$ compound have been investigated in the temperature range of 5－380K. The sample displays antiferromagnetic behaviour in the whole temperature range below Néel temperature $T_{\rm N}=309$K. The metamagnetic transition from antiferromagnetism to ferromagnetism can be induced by an applied field. The metamagnetic transition field decreases monotonically from 2T at 5K to 0.4T at 300K. The giant magnetoresistance effect is observed with the metamagnetic behaviour, such as -10.4% at 245K under a field of 5T.

Key words: rare-earth manganese compounds, giant magnetoresistance, metamagnetic transition

中图分类号:  (Giant magnetoresistance)

  • 75.47.De
75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)) 75.50.Ee (Antiferromagnetics) 75.40.-s (Critical-point effects, specific heats, short-range order)